Shoemaker s jack



G SUMNER. SHOEMAKERS JACK.

(No Model.)

No; 509,497. Patented Nov. 28,1893.

NTTE STATES ATEN Trice.

GEORGE SUMNER, OF SOUTH BRAINTREE, MASSACHUSETTS.

SHOEIVIAKERS JACK.

SPECIFICATION forming part of Letters Patent No. 509,497, dated November28, 1893.

Application filed June 17,1893.

To @ZZ whom it may concern:

Be it known that l, GEORGE SUMNER, a citizen of the United States,residing at South Braintree, in the county of Norfolk and Oominonwealthof Massachusetts, have invented a new and useful Improvement inShoemakers Jacks, of which the following is a specification, referencebeing had to the accompanying drawings, which forin a part hereof.

The object of my invention is a jack to hold Shoes while being burnished0r for shoemakers use in hand work and relates to improvements on thejack shown in my Patent No. 497,505, dated May 16, 1893, and consists inthe several features which will he moi'e particularly described andclaimed.

In the drawings, Figure l is a side elevation of a burnishing-jack andstandard ernbodying my invention. Fig. 2 is a vertical section showingthe last extended. Fig. 3 is a detail plan view of the two part last.Figs. 4, 5 and 6 are detail plan views.

The last is made in two parts each mounted on a separate standard, thefore-part a, being mounted on a fixed standard A, and the heel part b,being mounted on a pivoted standard B, whereby the last may be extendedto adapt it to shoes of different sizes. Each part of the last ispreferably formed with a spindle or', b', respectively which ts into asocket in the end of the standard and can be readily removed andreplaced by another. The heel-portion b, is hollowed out forming a shellwith a narrow rim b2, which extends around on each side nearly to thefront part of the heel-portion, but stops a little short, leaving thesteps orshoulders b3. The forepart forms the toe, ball and shank of thelast, and also has a neck d, which extends back into the shell of theheel-part tilling it out to the rim b2, when the last is not extended.

i Where the fore-part is cut away to form the neck a shoulder 0.3, isformed on each side which rests on the step b3, of the heeLp-art forsupport.

The last is thinned down as much as is consistent with strength in orderto have it as light as possible, with a strengthening rib ott. Thefore-part standard A, is fixed to the bracket G, and the heel-partstandard B, is pivoted to said bracket at C. i This bracket has aspindle D, which enters a socket in the Serial No. 477,921. (No model.)

column E, and can be adjusted to different elevations by means of theset-screw d. The column E, has a base E', which is screwed to the floor.Two pairs of toggle-jointed levers f, f', connect the two standards somedistance below the last. Hinged to the pivot of the toggle-jointedlevers is a connecting-rod l, which extends downward and is hinged atits lower end to a pintle h', in the forked lever arm L fiilcruined on apm h2, passing through the standard A. The link g, g, connects the outerend of the forked leverh, with the treadle-bar G. This link is madeextensible by being composed of two over-lapping bars slotted lengthwiseand clamped together by clamping screws g', g', which can be so adjustedas to lengthen `or shorten the link to correspond with the raising orlowering of the standards A, B. One end of the treadle-bar has a treadleG', and the other end is hinged by the pintle 7s, to the pintle 7c',journaled to the bracket m, so that the treadle can have both a lateraland a vertical movement. When the treadle is depressed, the link g, g,pulls down the outer end of the forked lever 7L, pushing up theconnecting-rod Z, and opening toggle-levers f, f', which thus throw backthe pivoted standard B, and extend the last. A spring pawl fn, jointedto the side of the treadle-bar engages with the curved ratchet-bar R,and holds the treadle at any desired point of depression with the lastextended accordingly. When it is desired to shorten the last by closingthe distended heel portion, the pawl is tripped out of engagement withthe ratchet by kicking the treadle to one side, as is allowed by thehinged joint at 7c, already described. A spring P, assists the returnmovenient upward. The flat spring S, pressing up against the heel of thepawl holds the pawl to its engagement with the ratchet when the treadleis depressed, and when the pawl is tripped the stop pin t projectingfrom the side of the treadle-bai' G, prevents the pawl from swingingaround on its pivot n. The link g, g, is pivoted at each end withsuihcient play to allow its lower end to swing out with the necessarylateral movement of the treadlebar already described, and its owngravity will carry it back to bring the pawl into line with theratchet-bar when the foot is re- IOO moved after the treadle is restoredto its elevated position. A guard W, prevents too great lateral movementof the treadle-bar.

The teeth of the ratchet bar are preferably arranged at such intervalsthat a depression of the treadle one tooth will extend the last one sizeof shoe.

What I claim as my invention is- 1. In a jack, a fixed standard mountedupon asuitable base, C, and a pivoted standard pivoted at its lower endto said base, supporting column E, a two-part last, one part beingmounted on each of said two standards, togglelevers connecting the twostandards,aconnect ing-rod Zjoined at its upper end to the togglejoint,arm 7@ pivoted to one of the standards and joined at its inner end tothe lower end of connecting-rod Z, link g g joined to the outer end ofarm h, treadle G pivoted at a point intermediate of its two ends to thelower end of said link and hinged at its outer end by pintle 7c topin'tle 7s which is journaled in a bracket attached to the column E in amanner to allow both a vertical and a lateral motion to the treadle,ratchet bar R, and springpawl n attached to the treadle, substantiallyas described.

2. In a jack, axed standard and a pivoted standard, a two-part last, onepart being mounted on each standard, the heel part being formed with arecess on its upper side and a semicircular rim, the fore-part beingformed with a neck which enters the recess of the heel-part and fitsinside the rim, and formed with a shoulder a3 which is adapted to reston a step b3 of the heel part, a treadle and connecting rods andtoggle-levers by which the pivoted standard may be opened away from thexed standard, thereby extending the two-part last, and a ratchet toretain the pivoted standard in its adjusted position, substantially asdescribed.

3. In a jack, a fixed standard and a pivoted standard, a two-part last,one part being mounted on each standard, toggle-levers connectingthe-two standards, a connecting rod Zjoined at its upper end to thejoint of the toggle-levers, arm 71, pivoted to one of t-he standards andjoined at its inner end to the lower end of the connecting rod Z, link gg joined to the outer end of arm h, treadle-bar G pivoted at a pointintermediate ot' its two ends to the lower end of said link and hingedat its outer end by pintle k to pintle k which is journaled in a bracketm in a manner to allow a vertical and a lateral movement of the treadle,curved ratchet-bar R, spring-pawl 'n attached to the treadle, and guardW, substantially as described.

4. In a jack, a fixed standard and a pivoted standard, a two-part last,one part being mounted on each standard, a spindled bracket base uponwhich the two standards are mounted in common, a column with socket toreceive the bracket spindle and a clamping device to hold the bracket atdifferent elevations above the column, toggle-levers connecting the twostandards, a connecting rod Z, joined at its upper end to thetoggle-levers, arm h, pivoted to one ofthe standards and joined at itsinner end to the lower end of the connecting rod Z, extensible link g gcomposed of two slotted bars overlaying each other and adjustable byclamping screws to diierent lengths to correspond with the elevation ofthe standards, said link joining the outer end of arm h and treadle Gr,curved ratchet-bar and pawl to retain the treadle and extended standardsat any position desired, substantially as described.

GERGE SUMNER.

Witnesses:

WILLIAM M. PRESI, ELLIS HOLLINGSWORTH.

